Final answer:
Superior and inferior rotation are movements of the scapula during upper limb abduction and adduction respectively. They involve the movement of the glenoid cavity and the scapular spine. These movements are essential for the full range of motion of the upper limb.
Step-by-step explanation:
Superior rotation and inferior rotation are movements of the scapula during upper limb abduction and adduction respectively. Superior rotation involves the upward movement of the glenoid cavity as the medial end of the scapular spine moves downward, while inferior rotation involves the downward motion of the glenoid cavity with upward movement of the medial end of the scapular spine. These movements are important for the full range of motion of the upper limb.